loop0: detected capacity change from 0 to 4096 ====================================================== WARNING: possible circular locking dependency detected syzkaller #0 Not tainted ------------------------------------------------------ syz.0.1084/18715 is trying to acquire lock: ffff8880629b5cd0 (&ni->ni_lock#2/5){+.+.}-{4:4}, at: ni_lock fs/ntfs3/ntfs_fs.h:1247 [inline] ffff8880629b5cd0 (&ni->ni_lock#2/5){+.+.}-{4:4}, at: attr_data_get_block+0x1cd/0x2c0 fs/ntfs3/attrib.c:976 but task is already holding lock: ffff8880629b6168 (mapping.invalidate_lock#11){.+.+}-{4:4}, at: filemap_invalidate_lock_shared include/linux/fs.h:1089 [inline] ffff8880629b6168 (mapping.invalidate_lock#11){.+.+}-{4:4}, at: filemap_fault+0x6e0/0x13c0 mm/filemap.c:3585 which lock already depends on the new lock. the existing dependency chain (in reverse order) is: -> #3 (mapping.invalidate_lock#11){.+.+}-{4:4}: down_read+0x97/0x200 kernel/locking/rwsem.c:1574 filemap_invalidate_lock_shared include/linux/fs.h:1089 [inline] filemap_fault+0x6e0/0x13c0 mm/filemap.c:3585 __do_fault+0x138/0x2a0 mm/memory.c:5565 do_read_fault mm/memory.c:6000 [inline] do_fault mm/memory.c:6134 [inline] do_pte_missing+0x1828/0x28f0 mm/memory.c:4700 handle_pte_fault mm/memory.c:6558 [inline] __handle_mm_fault mm/memory.c:6707 [inline] handle_mm_fault+0xf64/0x28c0 mm/memory.c:6876 do_user_addr_fault+0xa4f/0x1340 arch/x86/mm/fault.c:1343 handle_page_fault arch/x86/mm/fault.c:1483 [inline] exc_page_fault+0x6a/0xc0 arch/x86/mm/fault.c:1536 asm_exc_page_fault+0x26/0x30 arch/x86/include/asm/idtentry.h:595 -> #2 (vm_lock){++++}-{0:0}: __vma_start_exclude_readers+0x283/0x930 mm/mmap_lock.c:125 __vma_start_write+0xdc/0x290 mm/mmap_lock.c:148 vma_start_write include/linux/mmap_lock.h:303 [inline] mprotect_fixup+0x657/0xad0 mm/mprotect.c:836 setup_arg_pages+0x658/0xbd0 fs/exec.c:675 load_elf_binary+0xc6d/0x28f0 fs/binfmt_elf.c:1028 search_binary_handler fs/exec.c:1765 [inline] exec_binprm fs/exec.c:1797 [inline] bprm_execve+0x930/0x1590 fs/exec.c:1853 kernel_execve+0x8c3/0x9c0 fs/exec.c:1997 try_to_run_init_process+0x13/0x60 init/main.c:1491 kernel_init+0xb2/0x1d0 init/main.c:1621 ret_from_fork+0x514/0xb70 arch/x86/kernel/process.c:158 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245 -> #1 (&mm->mmap_lock){++++}-{4:4}: down_read_killable+0xa4/0x220 kernel/locking/rwsem.c:1599 mmap_read_lock_killable+0x1d/0x70 include/linux/mmap_lock.h:609 get_mmap_lock_carefully mm/mmap_lock.c:450 [inline] lock_mm_and_find_vma+0x2d6/0x340 mm/mmap_lock.c:501 do_user_addr_fault+0x343/0x1340 arch/x86/mm/fault.c:1366 handle_page_fault arch/x86/mm/fault.c:1483 [inline] exc_page_fault+0x6a/0xc0 arch/x86/mm/fault.c:1536 asm_exc_page_fault+0x26/0x30 arch/x86/include/asm/idtentry.h:595 filldir+0x2bd/0x630 fs/readdir.c:-1 dir_emit include/linux/fs.h:3607 [inline] ntfs_dir_emit fs/ntfs3/dir.c:388 [inline] ntfs_read_hdr+0x8a7/0xc10 fs/ntfs3/dir.c:429 ntfs_readdir+0x9ab/0xf70 fs/ntfs3/dir.c:589 iterate_dir+0x2f1/0x4e0 fs/readdir.c:110 __do_sys_getdents fs/readdir.c:319 [inline] __se_sys_getdents+0xf1/0x270 fs/readdir.c:304 do_syscall_x64 arch/x86/entry/syscall_64.c:61 [inline] do_syscall_64+0x166/0x520 arch/x86/entry/syscall_64.c:84 entry_SYSCALL_64_after_hwframe+0x77/0x7f -> #0 (&ni->ni_lock#2/5){+.+.}-{4:4}: check_prev_add kernel/locking/lockdep.c:3209 [inline] check_prevs_add kernel/locking/lockdep.c:3328 [inline] validate_chain kernel/locking/lockdep.c:3952 [inline] __lock_acquire+0x164c/0x2de0 kernel/locking/lockdep.c:5288 lock_acquire+0x115/0x350 kernel/locking/lockdep.c:5942 __mutex_lock_common kernel/locking/rtmutex_api.c:561 [inline] mutex_lock_nested+0x5a/0x1d0 kernel/locking/rtmutex_api.c:580 ni_lock fs/ntfs3/ntfs_fs.h:1247 [inline] attr_data_get_block+0x1cd/0x2c0 fs/ntfs3/attrib.c:976 ntfs_iomap_begin+0x4f0/0xf30 fs/ntfs3/inode.c:978 iomap_iter_next include/linux/iomap.h:382 [inline] ntfs_iomap_next+0x5b6/0x880 fs/ntfs3/inode.c:2319 iomap_iter+0xe2/0xec0 fs/iomap/iter.c:122 iomap_read_folio+0x638/0x970 fs/iomap/buffered-io.c:675 ntfs_read_folio+0x3f1/0x4b0 fs/ntfs3/inode.c:856 filemap_read_folio+0x12c/0x3a0 mm/filemap.c:2520 filemap_fault+0xd12/0x13c0 mm/filemap.c:3689 __do_fault+0x138/0x2a0 mm/memory.c:5565 do_read_fault mm/memory.c:6000 [inline] do_fault mm/memory.c:6134 [inline] do_pte_missing+0x1828/0x28f0 mm/memory.c:4700 handle_pte_fault mm/memory.c:6558 [inline] __handle_mm_fault mm/memory.c:6707 [inline] handle_mm_fault+0xf64/0x28c0 mm/memory.c:6876 do_user_addr_fault+0xa4f/0x1340 arch/x86/mm/fault.c:1343 handle_page_fault arch/x86/mm/fault.c:1483 [inline] exc_page_fault+0x6a/0xc0 arch/x86/mm/fault.c:1536 asm_exc_page_fault+0x26/0x30 arch/x86/include/asm/idtentry.h:595 other info that might help us debug this: Chain exists of: &ni->ni_lock#2/5 --> vm_lock --> mapping.invalidate_lock#11 Possible unsafe locking scenario: CPU0 CPU1 ---- ---- rlock(mapping.invalidate_lock#11); lock(vm_lock); lock(mapping.invalidate_lock#11); lock(&ni->ni_lock#2/5); *** DEADLOCK *** locks held by syz.0.1084/18715: 1, last CPU#0: #0: ffff8880629b6168 (mapping.invalidate_lock#11){.+.+}-{4:4}, at: filemap_invalidate_lock_shared include/linux/fs.h:1089 [inline] #0: ffff8880629b6168 (mapping.invalidate_lock#11){.+.+}-{4:4}, at: filemap_fault+0x6e0/0x13c0 mm/filemap.c:3585 stack backtrace: CPU: 0 UID: 0 PID: 18715 Comm: syz.0.1084 Not tainted syzkaller #0 PREEMPT_{RT,(full)} Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/08/2026 Call Trace: dump_stack_lvl+0xe8/0x150 lib/dump_stack.c:120 print_circular_bug+0x2e2/0x300 kernel/locking/lockdep.c:2087 check_noncircular+0x12f/0x150 kernel/locking/lockdep.c:2219 check_prev_add kernel/locking/lockdep.c:3209 [inline] check_prevs_add kernel/locking/lockdep.c:3328 [inline] validate_chain kernel/locking/lockdep.c:3952 [inline] __lock_acquire+0x164c/0x2de0 kernel/locking/lockdep.c:5288 lock_acquire+0x115/0x350 kernel/locking/lockdep.c:5942 __mutex_lock_common kernel/locking/rtmutex_api.c:561 [inline] mutex_lock_nested+0x5a/0x1d0 kernel/locking/rtmutex_api.c:580 ni_lock fs/ntfs3/ntfs_fs.h:1247 [inline] attr_data_get_block+0x1cd/0x2c0 fs/ntfs3/attrib.c:976 ntfs_iomap_begin+0x4f0/0xf30 fs/ntfs3/inode.c:978 iomap_iter_next include/linux/iomap.h:382 [inline] ntfs_iomap_next+0x5b6/0x880 fs/ntfs3/inode.c:2319 iomap_iter+0xe2/0xec0 fs/iomap/iter.c:122 iomap_read_folio+0x638/0x970 fs/iomap/buffered-io.c:675 ntfs_read_folio+0x3f1/0x4b0 fs/ntfs3/inode.c:856 filemap_read_folio+0x12c/0x3a0 mm/filemap.c:2520 filemap_fault+0xd12/0x13c0 mm/filemap.c:3689 __do_fault+0x138/0x2a0 mm/memory.c:5565 do_read_fault mm/memory.c:6000 [inline] do_fault mm/memory.c:6134 [inline] do_pte_missing+0x1828/0x28f0 mm/memory.c:4700 handle_pte_fault mm/memory.c:6558 [inline] __handle_mm_fault mm/memory.c:6707 [inline] handle_mm_fault+0xf64/0x28c0 mm/memory.c:6876 do_user_addr_fault+0xa4f/0x1340 arch/x86/mm/fault.c:1343 handle_page_fault arch/x86/mm/fault.c:1483 [inline] exc_page_fault+0x6a/0xc0 arch/x86/mm/fault.c:1536 asm_exc_page_fault+0x26/0x30 arch/x86/include/asm/idtentry.h:595 RIP: 0033:0x7fee52339bd5 Code: 1f 84 00 00 00 00 00 66 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 00 49 39 f0 0f 84 22 07 00 00 48 83 c6 01 48 89 b4 24 38 01 00 00 <41> 0f b6 44 32 ff 48 d3 e0 83 c1 08 89 8c 24 44 01 00 00 48 09 c2 RSP: 002b:00007fee506d54c0 EFLAGS: 00010202 RAX: 0000000000000000 RBX: 0000000000000f00 RCX: 0000000000000000 RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000000 RBP: 0000000000000000 R08: 0000000000000f00 R09: 0000000000000008 R10: 0000200000001e42 R11: 0000000000000246 R12: 0000000000000006 R13: 00007fee506d5ee0 R14: 00007fee506d5ea0 R15: 00007fee48295000